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Nanomechanics and the viscoelastic b...

Fisher, Frank Thomas.

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Nanomechanics and the viscoelastic behavior of carbon nanotube-reinforced polymers.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Nanomechanics and the viscoelastic behavior of carbon nanotube-reinforced polymers./
Author:	Fisher, Frank Thomas.
Description:	226 p.
Notes:	Adviser: L. Catherine Brinson.
Contained By:	Dissertation Abstracts International63-11B.
Subject:	Engineering, Materials Science. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3071639
ISBN:	0493915893

Nanomechanics and the viscoelastic behavior of carbon nanotube-reinforced polymers.
Fisher, Frank Thomas.

Nanomechanics and the viscoelastic behavior of carbon nanotube-reinforced polymers. - 226 p.

Adviser: L. Catherine Brinson.

Thesis (Ph.D.)--Northwestern University, 2002.

Recent experimental results demonstrate that substantial improvements in the mechanical behavior of polymers can be attained using small amounts of carbon nanotubes as a reinforcing phase. While this suggests the potential use of carbon nanotube-reinforced polymers (NRPs) for structural applications, the development of predictive models describing NRP effective behavior will be critical in the development and ultimate employment of such materials. To date many researchers have simply studied the nanoscale behavior of NRPs using techniques developed for traditional composite materials. While such studies can be useful, this dissertation seeks to extend these traditional theories to more accurately model the nanoscale interaction of the NRP constituent phases.

ISBN: 0493915893Subjects--Topical Terms:

1017759
Engineering, Materials Science.

Nanomechanics and the viscoelastic behavior of carbon nanotube-reinforced polymers.
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020 $a 0493915893
035 $a (UnM)AAI3071639
035 $a AAI3071639
040 $a UnM $c UnM
100 1 $a Fisher, Frank Thomas. $3 1256678
245 1 0 $a Nanomechanics and the viscoelastic behavior of carbon nanotube-reinforced polymers.
300 $a 226 p.
500 $a Adviser: L. Catherine Brinson.
500 $a Source: Dissertation Abstracts International, Volume: 63-11, Section: B, page: 5474.
502 $a Thesis (Ph.D.)--Northwestern University, 2002.
520 $a Recent experimental results demonstrate that substantial improvements in the mechanical behavior of polymers can be attained using small amounts of carbon nanotubes as a reinforcing phase. While this suggests the potential use of carbon nanotube-reinforced polymers (NRPs) for structural applications, the development of predictive models describing NRP effective behavior will be critical in the development and ultimate employment of such materials. To date many researchers have simply studied the nanoscale behavior of NRPs using techniques developed for traditional composite materials. While such studies can be useful, this dissertation seeks to extend these traditional theories to more accurately model the nanoscale interaction of the NRP constituent phases.
520 $a Motivated by micrographs showing that embedded nanotubes often exhibit significant curvature within the polymer, in the first section of this dissertation a hybrid finite element-micromechanical model is developed to incorporate nanotube waviness into micromechanical predictions of NRP effective modulus. While also suitable for other types of wavy inclusions, results from this model indicate that moderate nanotube waviness can dramatically decrease the effective modulus of these materials.
520 $a The second portion of this dissertation investigates the impact of the nanotubes on the overall NRP viscoelastic behavior. Because the nanotubes are on the size scale of the individual polymer chains, nanotubes may alter the viscoelastic response of the NRP in comparison to that of the pure polymer; this behavior is distinctly different from that seen in traditional polymer matrix composites. Dynamic mechanical analysis (DMA) results for each of three modes of viscoelastic behavior (glass transition temperature, relaxation spectrum, and physical aging) are all consistent with the hypothesis of a reduced mobility, non-bulk polymer phase in the vicinity of the embedded nanotubes.
520 $a These models represent initial efforts to incorporate nanoscale phenomena into predictive models of NRP mechanical behavior. As these results may identify areas where more detailed atomic-scale computational models (such as <italic> ab initio</italic> or molecular dynamics) are warranted, they will be beneficial in the modeling and development of these materials. These models will also aid the interpretation of NRP experimental data.
590 $a School code: 0163.
650 4 $a Engineering, Materials Science. $3 1017759
650 4 $a Engineering, Mechanical. $3 783786
650 4 $a Plastics Technology. $3 1023683
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690 $a 0794
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710 2 0 $a Northwestern University. $3 1018161
773 0 $t Dissertation Abstracts International $g 63-11B.
790 $a 0163
790 1 0 $a Brinson, L. Catherine, $e advisor
791 $a Ph.D.
792 $a 2002
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3071639